Remove kombu as a dependency for Senlin
Remove kombu as a dependency for Senlin

It was required before oslo.messaging.

Change-Id: I38d1165da51e9e611dfa856f8424a454855d8bdf

openstack/senlin,tengqm/senlin-container,tengqm/senlin-container,openstack/senlin,stackforge/senlin,openstack/senlin,stackforge/senlin